US 12,130,067 B2
Transport refrigeration system with counter-rotating fan assembly
Peter R. Bushnell, Cazenovia, NY (US)
Assigned to CARRIER CORPORATION, Palm Beach Gardens, FL (US)
Filed by CARRIER CORPORATION, Palm Beach Gardens, FL (US)
Filed on Aug. 16, 2022, as Appl. No. 17/888,979.
Claims priority of provisional application 63/242,701, filed on Sep. 10, 2021.
Prior Publication US 2023/0083462 A1, Mar. 16, 2023
Int. Cl. F25D 17/06 (2006.01); F25D 11/00 (2006.01)
CPC F25D 17/067 (2013.01) [F25D 11/003 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A transport refrigeration system, comprising:
an evaporator air management system including an evaporator heat exchanger and an air passage downstream of the evaporator heat exchanger;
a two-stage fan assembly within the air passage, the two-stage fan assembly including a first fan stage having a first fan rotor, a first motor associated with the first fan rotor for selectively causing the first fan rotor to rotate in a first direction about a fan axis, a second fan stage having a second fan rotor in series with the first fan rotor, and a second motor associated with the second fan rotor for selectively causing the second fan stage to rotate in a second, opposite direction about the fan axis, the first and second fan stages drawing air across the evaporator heat exchanger and through the air passage;
the air passage defined within an outer wall having an inlet portion, a central portion, and an outlet portion, wherein the central portion has an inside dimension corresponding to an outside dimension of the first fan stage;
the inlet portion has an inside dimension that is larger than the inside dimension of the central portion;
the outlet portion has an inside dimension that is larger than the inside dimension of the central portion; and
the first and second fan stages are both within the central portion, and wherein the first motor is positioned in the inlet portion and the second motor is positioned in the central portion.